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Losing power during standby

Joined
Oct 20, 2006
Messages
455 (0.07/day)
Location
Hereford, England
Processor Intel Core i5 750
Motherboard Maximus III Formula P55
Cooling Ultima 90i
Memory 4GB Kingston HyperX
Video Card(s) PNY GTX465 @ GTX470 w/ 1280MB vRAM
Storage OCZ Vertex 2E 60GB + 2x1TB Samsung F1
Display(s) Samsung 245B
Case Black Cosmos S
Audio Device(s) Creative Audigy 2ZS
Power Supply Antec NeoHE 550W
Software 7 Ultimate 64bit, OSX
Hi all,
Basically for the past few days, whenever I leave my PC (specs to the left, Win 7 x64) in standby for over about 30 mins or so, it loses power. I had 'hybrid standby' enabled before, so when I turned it on after it lost power it would resume Windows (although very slowly).
I can't actually tell that it is losing power but I am guessing that's the cause. I will return to the PC and try to resume by pressing any button on the keyboard but if it's lost power (or whatever), I have to use the power button. Now that I have enabled normal sleep in Windows, it will POST and then start Windows from scratch (instead of resuming from standby).
Not sure if this is a hardware of software problem tbh, I don't have any other issues with my PC even when gaming etc so I'm pretty sure it's not the PSU. Don't have any brown-outs or any electricity problems like that in my house that I'm aware of.

Any ideas?
 
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